pexpert/i386/pe_init.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * file: pe_init.c
  24  *    i386 platform expert initialization.
  25  */
  26 #include <sys/types.h>
  27 #include <mach/vm_param.h>
  28 #include <pexpert/protos.h>
  29 #include <pexpert/pexpert.h>
  30 #include <pexpert/boot.h>
  31 #include <pexpert/device_tree.h>
  32 #include <pexpert/pe_images.h>
  33 #include <kern/sched_prim.h>
  34
  35 #include "fakePPCStructs.h"
  36 #include "fakePPCDeviceTree.h"
  37 #include "boot_images.h"
  38
  39 /* extern references */
  40 extern void pe_identify_machine(void * args);
  41 extern void initialize_screen(void *, unsigned int);
  42
  43 /* Local references */
  44 static vm_offset_t mapframebuffer(caddr_t,int);
  45 static vm_offset_t PE_fb_vaddr = 0;
  46 static int         PE_fb_mode  = TEXT_MODE;
  47
  48 /* private globals */
  49 PE_state_t  PE_state;
  50 dt_data     gMemoryMapNode;
  51 dt_data     gDriversProp;
  52
  53 /* Clock Frequency Info */
  54 clock_frequency_info_t gPEClockFrequencyInfo;
  55
  56 int PE_initialize_console( PE_Video * info, int op )
  57 {
  58     static int   last_console = -1;
  59     Boot_Video   bootInfo;
  60     Boot_Video * bInfo;
  61
  62     /*
  63      * Refuse changes from outside pexpert.
  64      * The video mode setup by the booter cannot be changed.
  65      */
  66     if ( info && (info == &PE_state.video) )
  67     {
  68         bootInfo.v_baseAddr      = PE_fb_vaddr;
  69         bootInfo.v_rowBytes      = info->v_rowBytes;
  70         bootInfo.v_width     = info->v_width;
  71         bootInfo.v_height    = info->v_height;
  72         bootInfo.v_depth     = info->v_depth;
  73         bootInfo.v_display   = PE_fb_mode;
  74         bInfo = &bootInfo;
  75     }
  76     else
  77         bInfo = 0;
  78
  79     switch ( op ) {
  80
  81         case kPEDisableScreen:
  82             initialize_screen((void *) bInfo, op);
  83 #ifdef FIXME
  84             last_console = switch_to_serial_console();
  85 #endif
  86             kprintf("kPEDisableScreen %d\n", last_console);
  87             break;
  88
  89         case kPEEnableScreen:
  90             initialize_screen((void *) bInfo, op);
  91             kprintf("kPEEnableScreen %d\n", last_console);
  92 #ifdef FIXME
  93             if( last_console != -1)
  94                 switch_to_old_console( last_console);
  95 #endif
  96             break;
  97
  98         default:
  99             initialize_screen((void *) bInfo, op);
 100             break;
 101     }
 102
 103     return 0;
 104 }
 105
 106 void PE_init_iokit(void)
 107 {
 108     long * dt;
 109     int    i;
 110     KernelBootArgs_t *kap = (KernelBootArgs_t *)PE_state.bootArgs;
 111
 112     typedef struct {
 113         char            name[32];
 114         unsigned long   length;
 115         unsigned long   value[2];
 116     } DriversPackageProp;
 117
 118     PE_init_kprintf(TRUE);
 119     PE_init_printf(TRUE);
 120
 121     /*
 122      * Update the fake device tree with the driver information provided by
 123      * the booter.
 124      */
 125
 126     gDriversProp.length   = kap->numBootDrivers * sizeof(DriversPackageProp);
 127     gMemoryMapNode.length = 2 * sizeof(long);
 128
 129     dt = (long *) createdt( fakePPCDeviceTree,
 130                   &((boot_args*)PE_state.fakePPCBootArgs)->deviceTreeLength );
 131
 132     if ( dt )
 133     {
 134         DriversPackageProp * prop = (DriversPackageProp *) gDriversProp.address;
 135
 136         /* Copy driver info in kernBootStruct to fake device tree */
 137
 138         for ( i = 0; i < kap->numBootDrivers; i++, prop++ )
 139         {
 140             switch ( kap->driverConfig[i].type )
 141             {
 142                 case kBootDriverTypeKEXT:
 143                     sprintf(prop->name, "Driver-%lx", kap->driverConfig[i].address);
 144                     break;
 145
 146                  case kBootDriverTypeMKEXT:
 147                     sprintf(prop->name, "DriversPackage-%lx", kap->driverConfig[i].address);
 148                     break;
 149
 150                 default:
 151                     sprintf(prop->name, "DriverBogus-%lx", kap->driverConfig[i].address);
 152                     break;
 153             }
 154             prop->length   = sizeof(prop->value);
 155             prop->value[0] = kap->driverConfig[i].address;
 156             prop->value[1] = kap->driverConfig[i].size;
 157         }
 158
 159         *gMemoryMapNode.address = kap->numBootDrivers + 1;
 160     }
 161
 162     /* Setup powermac_info and powermac_machine_info structures */
 163
 164     ((boot_args*)PE_state.fakePPCBootArgs)->deviceTreeP = (unsigned long *) dt;
 165     ((boot_args*)PE_state.fakePPCBootArgs)->topOfKernelData     = (unsigned int) kalloc(0x2000);
 166
 167     /*
 168      * Setup the OpenFirmware Device Tree routines
 169      * so the console can be found and the right I/O space
 170      * can be used..
 171      */
 172     DTInit(dt);
 173
 174     /*
 175      * Fetch the CLUT and the noroot image.
 176      */
 177     bcopy( (void *) bootClut, appleClut8, sizeof(appleClut8) );
 178
 179     default_noroot.width  = kFailedBootWidth;
 180     default_noroot.height = kFailedBootHeight;
 181     default_noroot.dx     = 0;
 182     default_noroot.dy     = kFailedBootOffset;
 183     default_noroot_data   = failedBootPict;
 184
 185     /*
 186      * Initialize the panic UI
 187      */
 188     panic_ui_initialize( (unsigned char *) appleClut8 );
 189
 190     /*
 191      * Initialize the spinning wheel (progress indicator).
 192      */
 193     vc_progress_initialize( &default_progress, default_progress_data,
 194                             (unsigned char *) appleClut8 );
 195
 196     (void) StartIOKit( (void*)dt, PE_state.bootArgs, 0, 0);
 197 }
 198
 199 void PE_init_platform(boolean_t vm_initialized, void * args)
 200 {
 201         if (PE_state.initialized == FALSE)
 202         {
 203             KernelBootArgs_t *kap = (KernelBootArgs_t *) args;
 204
 205             PE_state.initialized        = TRUE;
 206             PE_state.bootArgs           = args;
 207             PE_state.video.v_baseAddr   = kap->video.v_baseAddr;
 208             PE_state.video.v_rowBytes   = kap->video.v_rowBytes;
 209             PE_state.video.v_height     = kap->video.v_height;
 210             PE_state.video.v_width      = kap->video.v_width;
 211             PE_state.video.v_depth      = kap->video.v_depth;
 212             PE_state.video.v_display    = kap->video.v_display;
 213             PE_fb_mode                  = kap->graphicsMode;
 214             PE_state.fakePPCBootArgs    = (boot_args *)&fakePPCBootArgs;
 215             ((boot_args *)PE_state.fakePPCBootArgs)->machineType        = 386;
 216
 217         if (PE_fb_mode == TEXT_MODE)
 218         {
 219             /* Force a text display if the booter did not setup a
 220              * VESA frame buffer.
 221              */
 222             PE_state.video.v_display = 0;
 223         }
 224     }
 225
 226     if (!vm_initialized)
 227     {
 228                 /* Hack! FIXME.. */
 229         outb(0x21, 0xff);   /* Maskout all interrupts Pic1 */
 230         outb(0xa1, 0xff);   /* Maskout all interrupts Pic2 */
 231
 232         pe_identify_machine(args);
 233     }
 234     else
 235     {
 236         pe_init_debug();
 237     }
 238 }
 239
 240 void PE_create_console( void )
 241 {
 242     if ( (PE_fb_vaddr == 0) && (PE_state.video.v_baseAddr != 0) )
 243     {
 244         PE_fb_vaddr = mapframebuffer((caddr_t) PE_state.video.v_baseAddr,
 245                                      (PE_fb_mode == TEXT_MODE)  ?
 246                       /* text mode */   PE_state.video.v_rowBytes :
 247                       /* grfx mode */   PE_state.video.v_rowBytes *
 248                                         PE_state.video.v_height);
 249     }
 250
 251     if ( PE_state.video.v_display )
 252         PE_initialize_console( &PE_state.video, kPEGraphicsMode );
 253     else
 254         PE_initialize_console( &PE_state.video, kPETextMode );
 255 }
 256
 257 int PE_current_console( PE_Video * info )
 258 {
 259     *info = PE_state.video;
 260
 261     if ( PE_fb_mode == TEXT_MODE )
 262     {
 263         /*
 264          * FIXME: Prevent the IOBootFrameBuffer from starting up
 265          * when we are in Text mode.
 266          */
 267         info->v_baseAddr = 0;
 268
 269         /*
 270          * Scale the size of the text screen from characters
 271          * to pixels.
 272          */
 273         info->v_width  *= 8;   // CHARWIDTH
 274         info->v_height *= 16;  // CHARHEIGHT
 275     }
 276
 277     return (0);
 278 }
 279
 280 void PE_display_icon( unsigned int flags, const char * name )
 281 {
 282     if ( default_noroot_data )
 283         vc_display_icon( &default_noroot, default_noroot_data );
 284 }
 285
 286 extern boolean_t PE_get_hotkey( unsigned char key )
 287 {
 288     return (FALSE);
 289 }
 290
 291 static timebase_callback_func gTimebaseCallback;
 292
 293 void PE_register_timebase_callback(timebase_callback_func callback)
 294 {
 295     gTimebaseCallback = callback;
 296
 297     PE_call_timebase_callback();
 298 }
 299
 300 void PE_call_timebase_callback(void)
 301 {
 302   struct timebase_freq_t timebase_freq;
 303   unsigned long          num, den, cnt;
 304
 305   num = gPEClockFrequencyInfo.bus_clock_rate_num * gPEClockFrequencyInfo.bus_to_dec_rate_num;
 306   den = gPEClockFrequencyInfo.bus_clock_rate_den * gPEClockFrequencyInfo.bus_to_dec_rate_den;
 307
 308   cnt = 2;
 309   while (cnt <= den) {
 310     if ((num % cnt) || (den % cnt)) {
 311       cnt++;
 312       continue;
 313     }
 314
 315     num /= cnt;
 316     den /= cnt;
 317   }
 318
 319   timebase_freq.timebase_num = num;
 320   timebase_freq.timebase_den = den;
 321
 322   if (gTimebaseCallback) gTimebaseCallback(&timebase_freq);
 323 }
 324
 325 /*
 326  * map the framebuffer into kernel vm and return the (virtual)
 327  * address.
 328  */
 329 static vm_offset_t
 330 mapframebuffer( caddr_t physaddr,  /* start of framebuffer */
 331                 int     length)    /* num bytes to map */
 332 {
 333     vm_offset_t vmaddr;
 334
 335         if (physaddr != (caddr_t)trunc_page(physaddr))
 336         panic("Framebuffer not on page boundary");
 337         vmaddr = io_map((vm_offset_t)physaddr, length);
 338         if (vmaddr == 0)
 339         panic("can't alloc VM for framebuffer");
 340
 341     return vmaddr;
 342 }
 343
 344 /*
 345  * The default (non-functional) PE_poll_input handler.
 346  */
 347 static int
 348 PE_stub_poll_input(unsigned int options, char * c)
 349 {
 350     *c = 0xff;
 351     return 1;  /* 0 for success, 1 for unsupported */
 352 }
 353
 354 /*
 355  * Called by the kernel debugger to poll for keyboard input.
 356  * Keyboard drivers may replace the default stub function
 357  * with their polled-mode input function.
 358  */
 359 int (*PE_poll_input)(unsigned int options, char * c)
 360         = PE_stub_poll_input;
 361
 362
 363